/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:29:37,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:29:37,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:29:37,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:29:37,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:29:37,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:29:37,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:29:37,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:29:37,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:29:37,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:29:37,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:29:37,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:29:37,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:29:37,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:29:37,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:29:37,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:29:37,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:29:37,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:29:37,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:29:37,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:29:37,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:29:37,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:29:37,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:29:37,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:29:37,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:29:37,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:29:37,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:29:37,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:29:37,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:29:37,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:29:37,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:29:37,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:29:37,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:29:37,522 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:29:37,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:29:37,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:29:37,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:29:37,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:29:37,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:29:37,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:29:37,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:29:37,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:29:37,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:29:37,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:29:37,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:29:37,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:29:37,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:29:37,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:29:37,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:29:37,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:29:37,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:29:37,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:29:37,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:29:37,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:29:37,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:29:37,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:29:37,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:29:37,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:29:37,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:29:38,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:29:38,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:29:38,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:29:38,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:29:38,041 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:29:38,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 13:29:38,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b631fe72f/75db5ef11b324ee6816f1cbe52317aa2/FLAGe7f6b4559 [2020-09-04 13:29:38,710 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:29:38,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 13:29:38,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b631fe72f/75db5ef11b324ee6816f1cbe52317aa2/FLAGe7f6b4559 [2020-09-04 13:29:39,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b631fe72f/75db5ef11b324ee6816f1cbe52317aa2 [2020-09-04 13:29:39,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:29:39,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:29:39,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:29:39,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:29:39,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:29:39,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52db61f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39, skipping insertion in model container [2020-09-04 13:29:39,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:29:39,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:29:39,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:29:39,384 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:29:39,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:29:39,435 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:29:39,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39 WrapperNode [2020-09-04 13:29:39,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:29:39,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:29:39,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:29:39,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:29:39,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:29:39,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:29:39,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:29:39,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:29:39,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:29:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:29:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:29:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 13:29:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:29:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:29:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:29:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 13:29:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:29:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:29:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:29:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:29:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:29:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:29:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:29:40,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:29:40,051 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 13:29:40,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:29:40 BoogieIcfgContainer [2020-09-04 13:29:40,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:29:40,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:29:40,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:29:40,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:29:40,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:29:39" (1/3) ... [2020-09-04 13:29:40,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcf5673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:29:40, skipping insertion in model container [2020-09-04 13:29:40,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39" (2/3) ... [2020-09-04 13:29:40,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcf5673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:29:40, skipping insertion in model container [2020-09-04 13:29:40,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:29:40" (3/3) ... [2020-09-04 13:29:40,073 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-04 13:29:40,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:29:40,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:29:40,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:29:40,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:29:40,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:29:40,141 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:29:40,141 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:29:40,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:29:40,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:29:40,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:29:40,142 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:29:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-04 13:29:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 13:29:40,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:40,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:40,170 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-09-04 13:29:40,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:40,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799552218] [2020-09-04 13:29:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:29:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:40,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799552218] [2020-09-04 13:29:40,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:29:40,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:29:40,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233368423] [2020-09-04 13:29:40,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:29:40,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:29:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:29:40,485 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-04 13:29:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:40,582 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-09-04 13:29:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:29:40,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-04 13:29:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:40,597 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:29:40,598 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 13:29:40,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:29:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 13:29:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 13:29:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 13:29:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 13:29:40,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-09-04 13:29:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:40,645 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 13:29:40,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:29:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 13:29:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:29:40,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:40,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:40,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:29:40,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-09-04 13:29:40,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:40,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075226996] [2020-09-04 13:29:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 13:29:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:40,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075226996] [2020-09-04 13:29:40,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:29:40,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:29:40,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519223372] [2020-09-04 13:29:40,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:29:40,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:40,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:29:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:29:40,751 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-09-04 13:29:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:40,819 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-04 13:29:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:29:40,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-04 13:29:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:40,821 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:29:40,821 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:29:40,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:29:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:29:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-04 13:29:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:29:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:29:40,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-09-04 13:29:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:40,831 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:29:40,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:29:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:29:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:29:40,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:40,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:40,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:29:40,833 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-09-04 13:29:40,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:40,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982416703] [2020-09-04 13:29:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:29:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:40,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982416703] [2020-09-04 13:29:40,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574958273] [2020-09-04 13:29:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:29:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:41,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-09-04 13:29:41,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497323138] [2020-09-04 13:29:41,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:29:41,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:29:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:29:41,054 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-09-04 13:29:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:41,120 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-04 13:29:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:29:41,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-04 13:29:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:41,122 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:29:41,123 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:29:41,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:29:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:29:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-04 13:29:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:29:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-04 13:29:41,130 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-09-04 13:29:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:41,130 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-04 13:29:41,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:29:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-04 13:29:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:29:41,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:41,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:41,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:29:41,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-09-04 13:29:41,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:41,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402835541] [2020-09-04 13:29:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 13:29:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402835541] [2020-09-04 13:29:41,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925184457] [2020-09-04 13:29:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:41,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:29:41,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:29:41,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:41,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-09-04 13:29:41,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912653408] [2020-09-04 13:29:41,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:29:41,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:29:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:29:41,615 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-09-04 13:29:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:41,708 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-04 13:29:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:29:41,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-04 13:29:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:41,710 INFO L225 Difference]: With dead ends: 38 [2020-09-04 13:29:41,710 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 13:29:41,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:29:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 13:29:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-04 13:29:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:29:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-04 13:29:41,722 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-09-04 13:29:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:41,722 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-04 13:29:41,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:29:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-04 13:29:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:29:41,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:41,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:41,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:41,941 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-09-04 13:29:41,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:41,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691042822] [2020-09-04 13:29:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:29:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:42,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691042822] [2020-09-04 13:29:42,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563423073] [2020-09-04 13:29:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:42,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:29:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:29:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:42,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:42,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-09-04 13:29:42,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519185984] [2020-09-04 13:29:42,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:29:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:29:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:29:42,137 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-09-04 13:29:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:42,208 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-04 13:29:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:29:42,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-04 13:29:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:42,210 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:29:42,210 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 13:29:42,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:29:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 13:29:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-04 13:29:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:29:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:29:42,217 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-09-04 13:29:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:42,217 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:29:42,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:29:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:29:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:29:42,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:42,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:42,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:42,432 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-09-04 13:29:42,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:42,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267203493] [2020-09-04 13:29:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:42,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267203493] [2020-09-04 13:29:42,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822743618] [2020-09-04 13:29:42,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:42,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:29:42,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:42,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:29:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:42,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:42,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-09-04 13:29:42,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440912885] [2020-09-04 13:29:42,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:29:42,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:29:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:29:42,658 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-09-04 13:29:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:42,709 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-04 13:29:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:29:42,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-04 13:29:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:42,711 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:29:42,711 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:29:42,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:29:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:29:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-04 13:29:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 13:29:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-09-04 13:29:42,717 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-09-04 13:29:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:42,717 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-09-04 13:29:42,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:29:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-09-04 13:29:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:29:42,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:42,718 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:42,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:42,931 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-09-04 13:29:42,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:42,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746523666] [2020-09-04 13:29:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:29:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:43,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746523666] [2020-09-04 13:29:43,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921286783] [2020-09-04 13:29:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:43,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:29:43,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:43,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:29:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:43,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:43,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-09-04 13:29:43,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393360755] [2020-09-04 13:29:43,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:29:43,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:29:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:29:43,203 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-09-04 13:29:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:43,282 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-04 13:29:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:29:43,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-04 13:29:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:43,283 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:29:43,285 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:29:43,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:29:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:29:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-04 13:29:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:29:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-04 13:29:43,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-09-04 13:29:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:43,294 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-04 13:29:43,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:29:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-04 13:29:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 13:29:43,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:43,295 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:43,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:29:43,496 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-09-04 13:29:43,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:43,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072659319] [2020-09-04 13:29:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:29:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:43,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072659319] [2020-09-04 13:29:43,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063598499] [2020-09-04 13:29:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:43,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:29:43,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:29:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:43,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:43,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-09-04 13:29:43,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651359124] [2020-09-04 13:29:43,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:29:43,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:29:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:29:43,846 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-09-04 13:29:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:43,935 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-04 13:29:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:29:43,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-04 13:29:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:43,938 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:29:43,939 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:29:43,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:29:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:29:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-04 13:29:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:29:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:29:43,945 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-09-04 13:29:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:43,949 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:29:43,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:29:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:29:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 13:29:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:43,951 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:44,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:44,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:44,152 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-09-04 13:29:44,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:44,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502355689] [2020-09-04 13:29:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 13:29:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:44,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502355689] [2020-09-04 13:29:44,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033036008] [2020-09-04 13:29:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 13:29:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:44,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:44,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-09-04 13:29:44,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291422000] [2020-09-04 13:29:44,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:29:44,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:29:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:29:44,428 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-09-04 13:29:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:44,509 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-09-04 13:29:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:29:44,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-09-04 13:29:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:44,511 INFO L225 Difference]: With dead ends: 48 [2020-09-04 13:29:44,511 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:29:44,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:29:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:29:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-04 13:29:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:29:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-04 13:29:44,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-04 13:29:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:44,518 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-04 13:29:44,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:29:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-04 13:29:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:29:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:44,519 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:44,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:44,732 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-09-04 13:29:44,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:44,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129728808] [2020-09-04 13:29:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 13:29:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129728808] [2020-09-04 13:29:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342496524] [2020-09-04 13:29:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:44,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:29:44,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:29:44,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:44,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:44,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-09-04 13:29:44,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578467097] [2020-09-04 13:29:44,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:29:44,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:29:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:29:44,946 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-04 13:29:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:45,044 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-09-04 13:29:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:29:45,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-09-04 13:29:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:45,046 INFO L225 Difference]: With dead ends: 50 [2020-09-04 13:29:45,046 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 13:29:45,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:29:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 13:29:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-04 13:29:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:29:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-04 13:29:45,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-09-04 13:29:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:45,053 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-04 13:29:45,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:29:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-04 13:29:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 13:29:45,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:45,054 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:45,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-04 13:29:45,266 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-09-04 13:29:45,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:45,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896788067] [2020-09-04 13:29:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:45,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:45,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:29:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:45,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896788067] [2020-09-04 13:29:45,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247368096] [2020-09-04 13:29:45,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:45,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:29:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 13:29:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:45,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:45,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-09-04 13:29:45,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685760335] [2020-09-04 13:29:45,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:29:45,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:45,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:29:45,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:29:45,745 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-09-04 13:29:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:45,836 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-09-04 13:29:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:29:45,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-04 13:29:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:45,838 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:29:45,838 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 13:29:45,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:29:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 13:29:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-04 13:29:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:29:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:29:45,844 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-09-04 13:29:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:45,845 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:29:45,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:29:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:29:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:29:45,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:45,846 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:46,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:46,058 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-09-04 13:29:46,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:46,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026480789] [2020-09-04 13:29:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:29:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:46,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026480789] [2020-09-04 13:29:46,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947117540] [2020-09-04 13:29:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:46,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:29:46,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:46,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:29:46,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:46,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:46,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-09-04 13:29:46,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868871991] [2020-09-04 13:29:46,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:29:46,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:29:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:29:46,313 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-09-04 13:29:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:46,430 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-04 13:29:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:29:46,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-09-04 13:29:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:46,431 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:29:46,431 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:29:46,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:29:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:29:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-04 13:29:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 13:29:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-09-04 13:29:46,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-09-04 13:29:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:46,438 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-09-04 13:29:46,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:29:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-09-04 13:29:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:29:46,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:46,439 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:46,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:46,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-09-04 13:29:46,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:46,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272801935] [2020-09-04 13:29:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:29:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:46,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272801935] [2020-09-04 13:29:46,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536164576] [2020-09-04 13:29:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:47,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:29:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-04 13:29:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:47,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:47,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-09-04 13:29:47,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528114487] [2020-09-04 13:29:47,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:29:47,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:29:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:29:47,309 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-09-04 13:29:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:47,416 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-09-04 13:29:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:29:47,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-09-04 13:29:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:47,418 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:29:47,418 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 13:29:47,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:29:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 13:29:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-04 13:29:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 13:29:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-04 13:29:47,425 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-09-04 13:29:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:47,426 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-04 13:29:47,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:29:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-04 13:29:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 13:29:47,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:47,427 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:47,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:29:47,635 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-09-04 13:29:47,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:47,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898751696] [2020-09-04 13:29:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:47,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:29:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:47,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898751696] [2020-09-04 13:29:47,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942545622] [2020-09-04 13:29:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:48,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:29:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:29:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:48,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-09-04 13:29:48,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97438934] [2020-09-04 13:29:48,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:29:48,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:29:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:29:48,661 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-09-04 13:29:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:48,773 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-09-04 13:29:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:29:48,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-09-04 13:29:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:48,775 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:29:48,775 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:29:48,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:29:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:29:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-04 13:29:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:29:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:29:48,783 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-09-04 13:29:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:48,783 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:29:48,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:29:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:29:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 13:29:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:48,785 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:48,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:29:48,992 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-09-04 13:29:48,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:48,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251583332] [2020-09-04 13:29:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:29:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:49,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251583332] [2020-09-04 13:29:49,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334765913] [2020-09-04 13:29:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-04 13:29:49,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:49,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:49,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-09-04 13:29:49,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457045641] [2020-09-04 13:29:49,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:29:49,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:49,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:29:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:29:49,370 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-09-04 13:29:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:49,474 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-09-04 13:29:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:29:49,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-09-04 13:29:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:49,476 INFO L225 Difference]: With dead ends: 60 [2020-09-04 13:29:49,476 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:29:49,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:29:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:29:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-04 13:29:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 13:29:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-09-04 13:29:49,486 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-09-04 13:29:49,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:49,487 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-09-04 13:29:49,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:29:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-09-04 13:29:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 13:29:49,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:49,491 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:49,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-04 13:29:49,703 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-09-04 13:29:49,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:49,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197521545] [2020-09-04 13:29:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-04 13:29:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:49,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197521545] [2020-09-04 13:29:49,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262464362] [2020-09-04 13:29:49,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:49,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:29:49,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:29:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:50,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:50,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-09-04 13:29:50,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723901725] [2020-09-04 13:29:50,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:29:50,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:29:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:29:50,032 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-09-04 13:29:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:50,169 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-04 13:29:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:29:50,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-09-04 13:29:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:50,170 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:29:50,170 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:29:50,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:29:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:29:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-09-04 13:29:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 13:29:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-09-04 13:29:50,183 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-09-04 13:29:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:50,183 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-09-04 13:29:50,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:29:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-09-04 13:29:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 13:29:50,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:50,186 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:50,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:50,387 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-09-04 13:29:50,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:50,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522956462] [2020-09-04 13:29:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:50,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:50,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-04 13:29:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:50,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522956462] [2020-09-04 13:29:50,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676221381] [2020-09-04 13:29:50,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:51,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:29:51,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-04 13:29:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:51,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:51,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-09-04 13:29:51,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281061343] [2020-09-04 13:29:51,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:29:51,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:29:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:29:51,267 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-09-04 13:29:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:51,390 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-09-04 13:29:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:29:51,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-09-04 13:29:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:51,392 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:29:51,392 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:29:51,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:29:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:29:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-04 13:29:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:29:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:29:51,402 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-09-04 13:29:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:51,402 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:29:51,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:29:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:29:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 13:29:51,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:51,403 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:51,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:29:51,606 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-09-04 13:29:51,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:51,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505044935] [2020-09-04 13:29:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:51,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 13:29:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:51,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505044935] [2020-09-04 13:29:51,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357085655] [2020-09-04 13:29:51,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:51,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:29:51,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:29:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:51,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:51,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-09-04 13:29:51,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869735786] [2020-09-04 13:29:51,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:29:51,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:29:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:29:51,984 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-09-04 13:29:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:52,076 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-09-04 13:29:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:29:52,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-09-04 13:29:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:52,078 INFO L225 Difference]: With dead ends: 66 [2020-09-04 13:29:52,078 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:29:52,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:29:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:29:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-04 13:29:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 13:29:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-04 13:29:52,091 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-09-04 13:29:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:52,091 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-04 13:29:52,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:29:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-04 13:29:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 13:29:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:52,093 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:52,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-04 13:29:52,294 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-09-04 13:29:52,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:52,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538439006] [2020-09-04 13:29:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:52,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 13:29:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538439006] [2020-09-04 13:29:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426599609] [2020-09-04 13:29:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:54,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-04 13:29:54,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:29:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:54,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:54,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-09-04 13:29:54,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348704658] [2020-09-04 13:29:54,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 13:29:54,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 13:29:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:29:54,667 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-09-04 13:29:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:54,761 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-09-04 13:29:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:29:54,761 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-09-04 13:29:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:54,762 INFO L225 Difference]: With dead ends: 68 [2020-09-04 13:29:54,762 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 13:29:54,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:29:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 13:29:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-04 13:29:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 13:29:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-04 13:29:54,767 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-09-04 13:29:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:54,767 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-04 13:29:54,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 13:29:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-04 13:29:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 13:29:54,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:54,768 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:54,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:54,980 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-09-04 13:29:54,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:54,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200405213] [2020-09-04 13:29:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:55,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:55,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:29:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:55,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200405213] [2020-09-04 13:29:55,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316539012] [2020-09-04 13:29:55,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:58,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-09-04 13:29:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:29:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:58,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:58,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-09-04 13:29:58,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722385595] [2020-09-04 13:29:58,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:29:58,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:58,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:29:58,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:29:58,979 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-09-04 13:29:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:59,117 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-09-04 13:29:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:29:59,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-09-04 13:29:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:59,118 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:29:59,118 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:29:59,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:29:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:29:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-04 13:29:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:29:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:29:59,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-09-04 13:29:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:59,123 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:29:59,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:29:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:29:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 13:29:59,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:59,124 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:59,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:59,325 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-09-04 13:29:59,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:59,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416890036] [2020-09-04 13:29:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:59,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:29:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416890036] [2020-09-04 13:29:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257950776] [2020-09-04 13:29:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-04 13:29:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:59,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:59,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-09-04 13:29:59,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214848596] [2020-09-04 13:29:59,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 13:29:59,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:59,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 13:29:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:29:59,812 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 24 states. [2020-09-04 13:29:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:59,931 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-09-04 13:29:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 13:29:59,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-09-04 13:29:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:59,932 INFO L225 Difference]: With dead ends: 71 [2020-09-04 13:29:59,933 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 13:29:59,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:29:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 13:29:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-04 13:29:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 13:29:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-09-04 13:29:59,939 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-09-04 13:29:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:59,939 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-09-04 13:29:59,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 13:29:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-09-04 13:29:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 13:29:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:59,940 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:30:00,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:30:00,148 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:30:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:30:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-09-04 13:30:00,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:30:00,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487268172] [2020-09-04 13:30:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:30:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:30:00,290 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:30:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:30:00,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:30:00,466 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:30:00,466 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:30:00,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 13:30:00,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:30:00 BoogieIcfgContainer [2020-09-04 13:30:00,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:30:00,587 INFO L168 Benchmark]: Toolchain (without parser) took 21524.08 ms. Allocated memory was 138.4 MB in the beginning and 305.1 MB in the end (delta: 166.7 MB). Free memory was 101.5 MB in the beginning and 192.2 MB in the end (delta: -90.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:30:00,588 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:30:00,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.05 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:30:00,590 INFO L168 Benchmark]: Boogie Preprocessor took 181.94 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 180.2 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:30:00,590 INFO L168 Benchmark]: RCFGBuilder took 436.49 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 164.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:30:00,591 INFO L168 Benchmark]: TraceAbstraction took 20524.97 ms. Allocated memory was 202.9 MB in the beginning and 305.1 MB in the end (delta: 102.2 MB). Free memory was 163.9 MB in the beginning and 192.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:30:00,593 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 371.05 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 181.94 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 180.2 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.49 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 164.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20524.97 ms. Allocated memory was 202.9 MB in the beginning and 305.1 MB in the end (delta: 102.2 MB). Free memory was 163.9 MB in the beginning and 192.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.3s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 2032 SDs, 0 SdLazy, 1389 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1439 ConstructedInterpolants, 0 QuantifiedInterpolants, 131957 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...